The Estate is the former seat of the Dukes of Leeds and the Earls of Godolphin. It contains a Grade I listed Tudor/Stuart mansion, complete with early formal gardens (dating from circa 1500) and Elizabethan stables (circa 1600). The present house is remnant of a larger mansion.
From 1786 it was owned by the Dukes of Leeds who never lived there. In 1920 the 10th Duke of Leeds sold it to the sitting tenant Peter Quintrell Treloar.
The house and gardens were acquired by the National Trust in August 2007. Various events are held throughout the year. The house is approached from the north and consists of three wings around a square courtyard and the front wall of a further building on the south side. The main buildings originally stood to the south of this with two projecting wings. One room of the 16th-century remains in the east range; this has linenfold panelling. Opposite the hall range is the Jacobean range; the north side is castellated and has a loggia of seven bays on the ground floor. Stylistic features here appear to be of the mid 17th-century and suggest that the accepted date for the house of after 1712 is very unlikely. The house is available as a holiday let for approximately three weeks each month when it is not open to the public.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.